San Luis Valley Solar Array
Saguache County, Colorado · EIA plant ID 61605 · Operator: AEP Onsite Partners
Nameplate3MWSummer 3 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor22%solar units, summer MW
Heat rate—thermal plants only
First online2017
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2017 | 1.2 | 30.8% | — |
| 2018 | 6.5 | 27.4% | — |
| 2019 | 6.4 | 27.2% | — |
| 2020 | 6.5 | 27.4% | — |
| 2021 | 6.6 | 28.1% | — |
| 2022 | 6.2 | 26.1% | — |
| 2023 | 6 | 25.2% | — |
| 2024 | 5.1 | 21.6% | — |
| 2025 | 5.1 | 21.6% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 2.7 | 2.7 | Nov 2017 | Operating | — | coming soon |
Owner / operator
Operator: AEP Onsite Partners. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AEP Onsite Partners | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Center | retired | 10.5 km |
| Hooper Solar | 52 MW | 22.3 km |
| Monte Vista Solar 2 CSG, LLC | 2 MW | 25.2 km |
| San Luis Valley Solar Ranch | 35 MW | 27.3 km |
| Cogentrix of Alamosa | 30 MW | 30.6 km |
| Greater Sandhill I | 19 MW | 30.7 km |